ProAid Portable Electric Pencil Sharpener, Battery Operated or Usb Powered Pencil Sharpener with Auto-stop Function, Suitable for Students and Office Staffs, Red SAFETY PROTECTION: The ProAid electric pencil sharpener has a function of protection for its au-to stop design, the sharpener will stop work when the cover is open. SMOOTH AND FAST WORK: It will take the sharpener 8-10 seconds to finish one work. Hold a pencil and put it into the sharpening hole, the pencil sharpener will start to sharp quickly and smoothly for its steel blade. Take away the pencil from the Sharpener when it is sharp and the sharpener will stop working automatically. WIDE APPLICATION: This pencil sharpener is compact in size, perfect for students, office staff, besides, powered by usb cable(included) and batterries, it's also a perfect sharpening tool to bring out for drawing. EASY TO CLEAN OUT: It has a detachable collect scrap box. Although the waste container was small, it has plenty of room for wood shavings. RELIABLE CUSTOMER SERVICE: The Proaid will be responsible for each of our product, please contact us at any time if you have any problems.30-day money back guarantee, 1 year replacement warranty and lifetime customer service guarantee.